Introduction to Op-amps 0.0 / 5 ? EngineeringEDCBTEC NationalEdexcel Created by: NatmacCreated on: 24-03-20 12:05 What is an Op-Amp? an analogue integrated circuit with many internal components. 1 of 12 what is the purpose of Operational Amplifier? carrying out mathematical operations 2 of 12 What is an Inverting input? the op-amp changes the phase angle of the output signal exactly 180 degrees out of phase with respect to the input signal 3 of 12 What is a Non-Inverting Input? We provided positive feedback across the amplifier, but for the inverting configuration, we produce negative feedback across the op-amp circuit 4 of 12 What two things can external input be connected to? inverting or non-inverting input 5 of 12 What is the other input connected to? the output and zero volts 6 of 12 What is a comparator? Very high gain in its open-loop state, that is, there is no feedback resistor. 7 of 12 What are three important operational parameters? High input Impedance, Low output Impedance, Very high gain 8 of 12 What is the High input Impedance? Typically 1 Mega Ohm, it will not load the device, meaning that it reduces its own input voltage? 9 of 12 What is a Low output Impedance? Typically 200 Ohms or less so it can supply high output current without loss of output signal voltage 10 of 12 What is a Very high gain? Typically 10(x6) to give a large output signal for a very small input signal. 11 of 12 Why are these ideal values? Signal frequency and signal amplitude will affect these figures. 12 of 12
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